Starting the roundout too late or pulling the elevator
control back too rapidly to prevent the airplane form touching down prematurely
can impose a heavy load factor on the wing and cause an accelerated stall.

Suddenly increasing the angle of attack and stalling the
airplane during a roundout is a dangerous situation since it may cause
the airplane to land extremely hard on the main landing gear, and then
bounce back into the air. As the airplane contacts the ground, the tail
will be forced down very rapidly by the back pressure on the elevator and
by inertia acting downward on the tail.

Recovery from this situation requires prompt and positive
application of power prior to occurrence of the stall. This may be followed
by a normal landing if sufficient runway is available - otherwise the pilot
should EXECUTE A GO-AROUND immediately.